Table 4 Comparison of predation rates of N. melanostomus on Dikerogammarus villosus based on factorial ANOVA with the factors trial (single species vs. mixed species) and substratum (absence vs. presence)
From: Synergistic impacts by an invasive amphipod and an invasive fish explain native gammarid extinction
Factor | SS | df | MS | F | p |
|---|---|---|---|---|---|
Trial | |||||
| Â | 20544.067 | 1 | 20544.067 | 6.881 | 0.011 |
 Error | 194070.532 | 65 | 2985.7 |  |  |
Substratum | |||||
| Â | 61621.819 | 1 | 61621.819 | 22.974 | <0.001 |
 Error | 174342.766 | 65 | 2418.931 |  |  |
Interaction trial x substratum | |||||
| Â | 5549.039 | 1 | 5549.039 | 1.982 | 0.164 |
 Error | 181939.994 | 65 | 2799.077 |  |  |